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Significant Accounting Policies (Policies) | 6 Months Ended
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Jun. 30, 2025
Accounting Policies [Abstract] |
Basis of Accounting, Policy [Policy Text Block] | Financial Statement Presentation – The accompanying unaudited interim consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and in accordance with the instructions to Form 10‑Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (“SEC”). These unaudited interim consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10‑K which includes all the audited financial statements and footnotes required by U.S. GAAP for complete financial statements for the year ended December 31, 2024. In the opinion of management, all normal adjustments and recurring accruals considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. Certain prior-period amounts have been reclassified to conform to the current period presentation. The results for the three and six months ended June 30, 2025, are not necessarily indicative of the results that may be expected for the year ending December 31, 2025, or any other future period. The preparation of financial statements, in conformity with U.S. GAAP, requires management to make estimates and assumptions that affect amounts reported in the financial statements. Actual results could differ from these estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for credit losses (“ACL”). Amounts presented in the consolidated financial statements and footnote tables are rounded and presented to the nearest thousands of dollars except per share amounts. If the amounts are above $1.0 million, they are rounded one decimal point, and if they are above $1.0 billion, they are rounded two decimal points.
Consolidation, Policy [Policy Text Block] | Principles of Consolidation – The consolidated financial statements include the accounts of FS Bancorp and its wholly owned subsidiary, 1st Security Bank. All material intercompany accounts have been eliminated in consolidation.
Segment Reporting, Policy [Policy Text Block] | Segment Reporting – The Company operates in two business segments through the Bank: commercial and consumer banking and home lending. The Company’s business segments are determined based on the products and services provided, as well as the nature of the related business activities, and they reflect the way financial information is regularly reviewed for the purpose of allocating resources and evaluating performance of the Company’s businesses. The results for these business segments are based on management’s accounting process, which assigns income statement items and assets to each responsible operating segment. This process is dynamic and is based on management’s view of the Company’s operations. See “Note 13 – Business Segments.”
Subsequent Events, Policy [Policy Text Block] | Subsequent Events – The Company has evaluated events and transactions after June 30, 2025, for potential recognition or disclosure.
New Accounting Pronouncements, Policy [Policy Text Block] | RECENT ACCOUNTING PRONOUNCEMENTS In December 2023, the Financial Accounting Standards Board (“FASB”) issued guidance within Accounting Standards Update (“ASU”) 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The amendments in the ASU are intended to enhance transparency regarding income tax information by improving income tax disclosures, particularly related to the rate reconciliation and income taxes paid. The ASU requires entities to disclose specified categories within the rate reconciliation and to provide additional information for reconciling items that meet a defined quantitative threshold. Those amendments require disclosure of the following information about income taxes paid on an annual basis:
● | Income taxes paid (net of refunds received), disaggregated by federal and state taxes and by individual jurisdictions in which income taxes paid (net of refunds received) is equal to or greater than five percent of total income taxes paid (net refunds received).
● | Income tax expense (or benefit) from continuing operations disaggregated by federal and state jurisdictions.
The ASU is effective for annual periods beginning after December 15, 2024. Early adoption is permitted for annual financial statements that have not yet been issued or made available for issuance. The amendments should be applied on a prospective basis. The Company does not expect the ASU to have a material effect on its consolidated financial statements. In November 2024, the FASB issued guidance within ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. The amendments in the ASU require public companies to disclose, in the notes to financial statements, specified information about certain costs and expenses at each interim and annual reporting period. Specifically, public companies will be required to:
● | Disclose the amounts of (a) purchases of inventory; (b) employee compensation; (c) depreciation; (d) intangible asset amortization; and (e) depreciation, depletion, and amortization recognized as part of oil- and gas-producing activities (or other amounts of depletion expense) included in each relevant expense caption.
● | Include certain amounts that are already required to be disclosed under GAAP in the same disclosure as the other disaggregation requirements.
● | Disclose a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively.
● | Disclose the total amount of selling expenses and, in annual reporting periods, an entity’s definition of selling expenses.
This ASU is effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. The amendments should be applied prospectively. The Company is currently evaluating the impact of this ASU but does not expect it to have a material effect on its consolidated financial statements. In January 2025, the FASB issued guidance within ASU 2025-01, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. The amendment in this ASU amends the effective date of ASU 2024-03 to clarify that all public business entities are required to adopt the guidance in annual reporting periods beginning after December 15, 2026, and interim periods within annual reporting periods beginning after December 15, 2027. Early adoption of ASU 2024-03 is permitted. The Company is currently evaluating the impact of this ASU but does not expect it to have a material effect on its consolidated financial statements. Application of New Accounting Guidance Adopted in 2025 None.

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- Definition Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483426/235-10-50-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-1 + Details
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